全文获取类型
收费全文 | 10641篇 |
免费 | 652篇 |
国内免费 | 82篇 |
专业分类
耳鼻咽喉 | 72篇 |
儿科学 | 275篇 |
妇产科学 | 288篇 |
基础医学 | 1530篇 |
口腔科学 | 147篇 |
临床医学 | 856篇 |
内科学 | 2673篇 |
皮肤病学 | 149篇 |
神经病学 | 1527篇 |
特种医学 | 393篇 |
外科学 | 966篇 |
综合类 | 20篇 |
一般理论 | 3篇 |
预防医学 | 487篇 |
眼科学 | 157篇 |
药学 | 833篇 |
中国医学 | 10篇 |
肿瘤学 | 989篇 |
出版年
2024年 | 19篇 |
2023年 | 161篇 |
2022年 | 248篇 |
2021年 | 508篇 |
2020年 | 281篇 |
2019年 | 384篇 |
2018年 | 428篇 |
2017年 | 317篇 |
2016年 | 381篇 |
2015年 | 398篇 |
2014年 | 566篇 |
2013年 | 645篇 |
2012年 | 859篇 |
2011年 | 915篇 |
2010年 | 515篇 |
2009年 | 463篇 |
2008年 | 661篇 |
2007年 | 615篇 |
2006年 | 603篇 |
2005年 | 535篇 |
2004年 | 396篇 |
2003年 | 340篇 |
2002年 | 306篇 |
2001年 | 80篇 |
2000年 | 73篇 |
1999年 | 79篇 |
1998年 | 62篇 |
1997年 | 42篇 |
1996年 | 40篇 |
1995年 | 28篇 |
1994年 | 31篇 |
1993年 | 22篇 |
1992年 | 45篇 |
1991年 | 39篇 |
1990年 | 43篇 |
1989年 | 36篇 |
1988年 | 36篇 |
1987年 | 25篇 |
1986年 | 20篇 |
1985年 | 20篇 |
1984年 | 20篇 |
1983年 | 14篇 |
1982年 | 12篇 |
1981年 | 11篇 |
1980年 | 5篇 |
1979年 | 9篇 |
1978年 | 5篇 |
1968年 | 7篇 |
1967年 | 5篇 |
1966年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 312 毫秒
1.
A case of Rubinstein‐Taybi syndrome associated with growth hormone deficiency in childhood 下载免费PDF全文
2.
3.
4.
5.
6.
Chiara Tanzi Gaia Fallani Francesco Magnani Giovanni Marozza Silvia Pizzarotti Bruno Zoppi Davide Lazzeroni Lorenzo Brambilla Paolo Coruzzi Luca Moderato 《La Medicina del lavoro》2020,111(2):107
Background:Cardiovascular diseases (CVD), particularly the ischemic heart disease, are a growing public health issue. In addition, the return to work after an acute cardiovascular attack represents a complex challenge.Objectives:To evaluate utility and safety of cardiopulmonary exercise testing (CPET), particularly performed “on site”, to promote a return to work in line with the residual working capacity.Methods:Fifty-nine workers affected by a major cardiovascular event, aged 18-63 years, have been enrolled between 2015 and 2018. All the patients underwent a CPET in outpatient clinic. Eleven workers also underwent the “on site” CPET, recorded during their working activities.Results:Outpatient clinic CPET outcomes (i.e. normal, mild impairment or moderate/severe impairment of cardiopulmonary function) were associated with the subjective perception of workers’ health status after returning to work. The “on site” CPET was found to be safe and reliable to promote a personalized return to work of patients. In 7 out of 11 patients, the values of O2 consumption (VO2) during the working activity were higher than 40% of VO2 max as obtained from laboratory CPET.Conclusions:This study provides evidence for safety and usefulness of “on site” CPET for a personalized statement of fitness for work. This may facilitate the job retention of patients characterized by a high risk of unnecessary job loss. The use of CPET represents a first step of energy expenditure evaluation associated with specific working tasks.Key words: Acute coronary syndrome, cardiopulmonary exercise testing, return to work 相似文献
7.
Judith Bernardini Valerie Price Ana Figueiredo Aase Riemann Dora Leung 《Peritoneal dialysis international》2006,26(6):658-663
OBJECTIVE: To survey nurses around the world about current practices for peritoneal dialysis (PD) home training programs. DESIGN: Random sampling of nurses to complete a written survey from the International Society for Peritoneal Dialysis Nursing Liaison Committee. Settings: United States, Canada, South America (Brazil, Columbia), The Netherlands, Hong Kong. METHODS: Surveys and responses were sent by fax whenever possible, or by regular mail, or hand carried, or conducted by telephone. Results were stratified by geographic areas as well as by cumulative responses and were expressed as medians with ranges. Kruskal-Wallis was used to evaluate differences in responses. Associations between variables were tested with Pearson correlation. Univariate regression analysis was used to evaluate the impact of variables on peritonitis rates. Variables with p < 0.10 were included in a multivariate analysis. RESULTS: A total of 317 nurses responded: 88 in the United States, 46 in Canada, 58 in South America, 58 in Hong Kong, and 67 in The Netherlands. This represented 37% of all surveys distributed. Respondents had a median of 12 years' experience in nephrology (range 1-35 years), but only 31% had a formal background in adult education. Nearly half received their guidance to patient training from a nurse colleague, 11% were guided by a corporate colleague, and 8% were simply self-taught. Clinics responding had a median of 30 PD patients (range 1-400) and reported they trained a median of 8 patients per year (range 0-86). Reported peritonitis rates were a median 0.46 per year or 1 episode every 26 months. Peritonitis rates, however, were not known by 53% of respondents. Total training time per patient had a very wide range of hours, from 6 to 96. There was no correlation between training time and peritonitis rates among the study respondents (p = 0.38), nor with any other variables. CONCLUSIONS: There is wide variation in practices for PD patient training programs within countries and around the world. Training time did not appear to be related to peritonitis rates. Randomized trials of training practices are needed to determine which approaches produce the best outcomes for patients. 相似文献
8.
Daniela Brizzolara Anna Chilosi Paola Cipriani Gloria Di Filippo Filippo Gasperini Sara Mazzotti Chiara Pecini Pierluigi Zoccolotti 《Cognitive and behavioral neurology》2006,19(3):141-149
OBJECTIVE: The study aims to verify whether phonologic and rapid automatized naming (RAN) deficits are present and associated in Italian dyslexic children and whether they differentially affect dyslexics with and without a history of previous language delay (LD). BACKGROUND: According to the phonologic core deficit hypothesis, dyslexia may stem from impairment of the representation and manipulation of phonemes and may be closely associated with oral language deficits. However, deficits in tasks not requiring fine-grained phonologic representations, such as RAN, have also been described in dyslexic children. METHODS: Thirty-seven children were selected on the basis of a reading deficit and were assigned to 2 groups according to whether or not they had a history of early LD as determined retrospectively by parental report. A battery of reading and writing, verbal working memory, metaphonologic, RAN, and visual search tests were administered. RESULTS: RAN deficits were shared by most dyslexics (with and without a history of LD), whereas phonologic deficits were mainly associated with a previous LD. This last condition did not result in a more profound impairment of reading and writing decoding skills. CONCLUSION: In a shallow orthography such as Italian, RAN, not phonologic deficits, may represent the main cognitive marker of developmental dyslexia. 相似文献
9.
Osvaldo Chiara Stefania Cimbanassi Alessio Pitidis Sergio Vesconi 《World journal of emergency surgery : WJES》2006,1(1):12-7
Preventable trauma deaths are defined as deaths which could be avoided if optimal care has been delivered. Studies on preventable
trauma deaths have been accomplished initially with panel reviews of pre-hospital and hospital charts. However, several investigators
questioned the reliability and validity of this method because of low reproducibility of implicit judgments when they are
made by different experts. Nevertheless, number of studies were published all around the world and ultimately gained some
credibility, particularly in regions where comparisons were made before and after trauma system implementation with a resultant
fall in mortality. During the last decade of century the method of comparing observed survival with probability of survival
calculated from large trauma registries has obtained popularity. Preventable trauma deaths were identified as deaths occurred
notwithstanding a high calculated probability of survival. In recent years, preventable trauma deaths studies have been replaced
by population-based studies, which use databases representative of overall population, therefore with high epidemiologic value.
These databases contain readily available information which carry out the advantage of objectivity and large numbers. Nowadays,
population-based researches provide the strongest evidence regarding the effectiveness of trauma systems and trauma centers
on patient outcomes. 相似文献
10.
Hemolytic anemia during pegylated IFN-alpha2b plus ribavirin treatment for chronic hepatitis C: ribavirin is not always the culprit. 总被引:1,自引:0,他引:1
Ivan Gentile Chiara Viola Laura Reynaud Francesco Borrelli Raimondo Cerini Rocco Ciampi Marcello Piazza Guglielmo Borgia 《Journal of interferon & cytokine research》2005,25(5):283-285
A 53-year-old woman admitted to our department for histologically proven chronic hepatitis C had previously been treated with pegylated interferon-alpha2b (PEG-IFN) plus ribavirin. Combination therapy had been withdrawn after 5 weeks because of severe anemia (hemoglobin 8.2 g/dl) despite a reduction in ribavirin dose. A second liver biopsy showed moderate chronic hepatitis with portoportal and portocentral bridges (Ishak score: grading 14/18, staging 4-5/6). Consequently, the patient was retreated with 1.5 microg/kg body weight weekly PEG-IFN and 1000 mg/day ribavirin. Ribavirin was withdrawn about 3 months later because of anemia. After 1 month of PEG-IFN alone, hemoglobin had decreased further to reach 7.9 g/dl; consequently IFN was stopped. An elevated reticulocyte count, indirect bilirubin concentration, and lactic dehydrogenase (LDH) concentration, and a positive direct Coombs test (IgG3, C3d also for panagglutinant irregular antibodies on eluate) led us to diagnose autoimmune hemolytic anemia (AHA). The patient received 1 mg/kg body weight/day prednisone, and all parameters normalized within 20 days. This is the first case of IFN-related AHA during PEG-IFN plus ribavirin therapy. Physicians should be aware that PEG-IFN can be the cause of AHA during a ribavirin-containing regimen for chronic hepatitis C. 相似文献